| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YB/T 681-1997 | English | 239 |
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Days<=2
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(20A thin-walled seamless pipe with aviation norms)
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YB/T 681-1997
| Obsolete |
YB/T 681-1997
|